Survival and host range of the rice root nematode, Hirshmanniella oryzae.
Mathur, V. K.; Prasad, S. K.
Div. of Nematology, Indian Agricultural Research Inst., New Delhi, India.
Indian Journal of Nematology 1973, publ. 1974 Vol. 3 No. 2 pp. 88-93
Language of Text
Hirschmanniella oryzae can survive in host-free soil at 15 deg C, which was the optimum temperature, and in water, for about 16 weeks if kept in capped vials which are aerated once a week. Dry samples from paddy fields processed after 8 to 12 months yielded only a few specimens. The nematodes can survive in the fields during May to June at a temperature range of 35 to 45 deg C and also during December to January at 8 to 12 deg C. In the laboratory, the nematodes failed to multiply on 11 cultivated crops that were tested for the host range, but in fields they were found to utilize the following weeds as alternate hosts: Echinochloa crusgalli, Eclipta alba, Crogophora sp. and Brachiaria ramosa.